OLDER women with sleep apnea have twice the risk of developing dementia as those without the breathing disorder, according to a study published Tuesday, but the data werent conclusive as to why. The findings indicate that people with sleep apnea should be screened for cognitive problems, said Kristine Yaffe, an author of the study in JAMA: the Journal of the American Medical Association. Potential cognitive decline is another reason why you want to be medically followed carefully and possibly treated for sleep apnea, said Dr. Yaffe. Sleep apnea, in which sufferers stop breathing as many as hundreds of times a night, commonly results from a blockage of the airway during sleep. WSJ